---
product_id: 356505867
title: "CMTOOL Power Circuit Probe Tester 6V-24V DC Test Light, Automotive Circuit Tester Car Short Finder, Component Activation, Polarity Identify, Overload Protection"
brand: "cmtool"
price: "£19.26"
currency: GBP
in_stock: true
reviews_count: 10
category: "Cmtool"
url: https://www.desertcart.co.uk/products/356505867-cmtool-power-circuit-probe-tester-6v-24v-dc-test-light
store_origin: GB
region: United Kingdom
---

# 6V-24V DC range 4M extended test lead Overload protection at 7A CMTOOL Power Circuit Probe Tester 6V-24V DC Test Light, Automotive Circuit Tester Car Short Finder, Component Activation, Polarity Identify, Overload Protection

**Brand:** cmtool
**Price:** £19.26
**Availability:** ✅ In Stock

## Summary

> 🔧 Power up your diagnostics with precision and protection!

## Quick Answers

- **What is this?** CMTOOL Power Circuit Probe Tester 6V-24V DC Test Light, Automotive Circuit Tester Car Short Finder, Component Activation, Polarity Identify, Overload Protection by cmtool
- **How much does it cost?** £19.26 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/356505867-cmtool-power-circuit-probe-tester-6v-24v-dc-test-light)

## Best For

- cmtool enthusiasts

## Why This Product

- Trusted cmtool brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Extended 4M Reach:** Test front to rear of any vehicle effortlessly with a long, flexible detection line.
- • **Rapid Fault Detection:** High-sensitivity probes pinpoint wiring shorts and component faults fast, saving you valuable time.
- • **Smart Overload Protection:** Automatic circuit breaker trips at 7A with buzzer alert to safeguard your device and vehicle.
- • **Universal 6V-24V Compatibility:** Seamlessly diagnose all DC automotive electrical systems from cars to boats.
- • **Precision Polarity & Continuity Testing:** Instantly identify positive/negative polarity with dual-color LEDs and verify circuit continuity.

## Overview

The CMTOOL Power Circuit Probe Tester is a durable, ABS-built automotive diagnostic tool designed for 6V-24V DC systems. Featuring overload protection with a 7A automatic trip and buzzer, it offers polarity identification via dual LED indicators, continuity testing, component activation, and grounding verification. Its 4-meter extended test lead and high-sensitivity probes enable quick, accurate fault detection across cars, trucks, boats, and motorcycles, making it an essential tool for professionals and enthusiasts alike.

## Description

Buy CMTOOL Power Circuit Probe Tester 6V-24V DC Test Light, Automotive Circuit Tester Car Short Finder, Component Activation, Polarity Identify, Overload Protection: Circuit Testers - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Good - Why did you pick this product vs others?: A must have for equipment mechanic or field technician workers wonders really great and the price is perfect
Review: Works great! - I bought this so I could bench test some headlight bulbs and it works perfect! I hate messing with any kind of wiring, but this is just what I needed. I don't know how much I will use it, but it's great to have it and not need it. Worth the purchase!

## Features

- 【Wide Application & Overload Protection】The power circuit probe tester is made of ABS material, which is moisture-proof, high-temperature resistant and has a longer service life. It is suitable for diagnosis of all DC 6V to 24V automotive electrical systems and can work well on cars, trucks, boats, trailers, and motorcycles. The tester also has an overload protection device, When the current exceeds 7A, the circuit breaker inside the device will automatically trip and give out a buzzer prompt.
- 【Polarity Test & Continuity Test】The power circuit probe tester is made of insulating material and high-quality stainless steel tip, which can help you quickly identify the positive and negative polarity of the vehicle cable and plug. When the dc circuit tester touches the positive pole, the LED should be red; when it touches the negative pole, the LED should be GREEN. The power circuit probe tester is also used to check the continuity of switches, relays, diodes, fuses, and circuits.
- 【Component Activation and Testing】The automotive power circuit probe tester can activate components inside/outside the vehicle electrical system, perfect for professionals or car enthusiasts. The LED indicator light and buzzer prompt make it easy to test and check whether the component is defective or whether the rated current of the component is higher than the rated current of the car test light.
- 【Grounding Test & 4M Test Lead】The electric circuit tester has a ground prompt device, if the LED indicator turns green and the buzzer sounds, it means the ground is good. If not, the LED remains red and does not beep. The automotive circuit tester is equipped with a 4M extended detection line, covering the front to the rear of the vehicle, making it easy to test the entire vehicle circuit system.
- 【Tracking and Locating Short Circuit】The power circuit probe tester uses advanced high-sensitivity probes to provide you with fast and accurate detection. Using this automotive test light can save a lot of time to troubleshoot the car wiring circuit, to quickly and accurately find the faulty wire and its fault point.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09CL7ZDZ5 |
| Best Sellers Rank | #98,793 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #143 in Circuit Testers |
| Brand Name | CMTOOL |
| Color | Red |
| Customer Reviews | 4.5 4.5 out of 5 stars (925) |
| Included Components | Power circuit probe tester |
| Item Weight | 0.33 Kilograms |
| Manufacturer | CMTOOL |
| Minimum Operating Voltage | 6 Volts (DC) |
| Model | AY-29 |
| Power Source | Battery Powered |
| Style Name | Circuit Testers |
| UPC | 758358922504 |

## Product Details

- **Brand:** CMTOOL
- **Color:** Red
- **Item Weight:** 0.33 Kilograms
- **Power Source:** Battery Powered
- **Style:** Circuit Testers

## Images

![CMTOOL Power Circuit Probe Tester 6V-24V DC Test Light, Automotive Circuit Tester Car Short Finder, Component Activation, Polarity Identify, Overload Protection - Image 1](https://m.media-amazon.com/images/I/61RyWupGTNL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good
*by C***A on July 10, 2025*

Why did you pick this product vs others?: A must have for equipment mechanic or field technician workers wonders really great and the price is perfect

### ⭐⭐⭐⭐⭐ Works great!
*by K***Y on November 30, 2024*

I bought this so I could bench test some headlight bulbs and it works perfect! I hate messing with any kind of wiring, but this is just what I needed. I don't know how much I will use it, but it's great to have it and not need it. Worth the purchase!

### ⭐⭐⭐⭐ great tester
*by G***Y on December 4, 2024*

Works good with a battery on the bench or test on the car. Does what it said it would do. Handy test tool. No problem with shipping , came on time. Not a snap on tool but good for the money

## Frequently Bought Together

- CMTOOL Power Circuit Probe Tester 6V-24V DC Test Light, Automotive Circuit Tester Car Short Finder, Component Activation, Polarity Identify, Overload Protection
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*Product available on Desertcart United Kingdom*
*Store origin: GB*
*Last updated: 2026-05-14*